10:1 Metal Gearmotor 37Dx65L mm 12V with 64 CPR Encoder (Helical Pinion) View larger

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10:1 Metal Gearmotor 37Dx65L mm 12V with 64 CPR Encoder (Helical Pinion)

0104110000070388

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This gearmotor is a powerful 12V brushed DC motor with a 10:1 metal gearbox and an integrated quadrature encoder that provides a resolution of 64 counts per revolution of the motor shaft, which corresponds to 640 counts per revolution of the gearbox’s output shaft. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.

Key specifications:

voltage no-load performance stall extrapolation
12V 1000 RPM, 150 mA 4.9 kg⋅cm (68 oz⋅in), 5.5 A


See Description for more details about the product.

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Overview

Measuring 37 mm (1.46") in diameter, these brushed DC gearmotors are the largest and most powerful we carry. They are available in a range of gear ratios from 6.3:1 to 150:1 and with 12 V or 24 V motors, and all versions are available with integrated 64 CPR quadrature encoders on the motor shafts. The 12 V and 24 V motors offer approximately the same performance at their respective nominal voltages, with the 24 V motor drawing half the current of the 12 V motor. See the 37D metal gearmotor datasheet (2MB pdf) for more information, including detailed performance graphs for each gearmotor version. These powerful brushed DC gearmotor are available in a variety of different gear ratios and feature integrated quadrature encoders with 64 counts per revolution (CPR) of the motor shaft. The motor and encoder portion is available by itself (no gearbox), and versions without the encoder are also available. A more basic comparison table is available below.

Rated Voltage Stall Current No-Load Current Gear Ratio No-Load Speed (RPM) Extrapolated Stall Torque Max Power (W)


a.jpg

Without Encoder


b.jpg

With Encoder

(kg ⋅ cm) (oz ⋅ in)
12 V 5.5 A 0.15 A 1:1 (no gearbox) 10,000

0.5

7 - - 0104110000070401
6.3:1 1600 3.0 42 12 0104110000070289 0104110000070395
10:1 1000 4.9 68 12 0104110000070296 0104110000070388
19:1 540 8.5 120 12 0104110000065957 0104110000065940
30:1 330 14 190 12 0104110000065971 0104110000065964
50:1 200 21 290 10 0104110000065995 0104110000065988
70:1 150 27 380 8 0104110000066015 0104110000066008
100:1 100 34 470 8 0104110000066039 0104110000066022
131:1 76 45 630 6 0104110000066053 0104110000066046
150:1 67 49 680 6 0104110000066077 0104110000066060

Note: Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. In order to avoid damaging the gearbox, we recommend keeping continuously applied loads under 10 kg-cm (150 oz-in), and the recommended upper limit for instantaneous torque is 25 kg-cm (350 oz-in). Stalls can also result in rapid (potentially on the order of seconds) thermal damage to the motor windings and brushes; a general recommendation for brushed DC motor operation is 25% or less of the stall current.

These motors are intended for use at 12 V, though in general, these kinds of motors can run at voltages above and below the nominal voltage (they can begin rotating at voltages as low as 1 V). Lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor.

The gearboxes are composed mainly of spur gears, but they feature helical gears for the first stage for reduced noise and improved efficiency:

c.jpg


37D Gearmotor (Helical Pinion) with the gearbox removed showing the helical pinion gear and first mating gear.


On units with encoders, the encoder portion is protected by a black plastic end cap:

a.jpg
b.jpg


The end cap is easily removable if you need to access the encoder or want to slightly reduce the overall gearmotor size, but there is a little bit of base plastic that will remain, as shown in the pictures below:

c.jpg
d.jpg


Details

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f.jpg
g.jpg


This gearmotor is a powerful 12V brushed DC motor with a 10:1 metal gearbox and an integrated quadrature encoder that provides a resolution of 64 counts per revolution of the motor shaft, which corresponds to 640 counts per revolution of the gearbox’s output shaft. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.


Key specifications:

voltage no-load performance stall extrapolation
12V 1000 RPM, 150 mA 4.9 kg⋅cm (68 oz⋅in), 5.5 A



Dimensions

h.jpg


Dimensions of the 37D mm metal gearmotor with 64 CPR encoder. Units are mm over [inches].


This diagram is also available as a downloadable PDF (459k pdf).

Warning: Do not screw too far into the mounting holes as the screws can hit the gears. We recommend screwing no more than 3mm (0.12") into the screw hole.


Using the encoder

A two-channel Hall effect encoder is used to sense the rotation of a magnetic disk on a rear protrusion of the motor shaft. The quadrature encoder provides a resolution of 64 counts per revolution of the motor shaft when counting both edges of both channels. To compute the counts per revolution of the gearbox output, multiply the gear ratio by 64. The motor/encoder has six color-coded, 8" (20 cm) leads terminated by a 1x6 female header with a 0.1" pitch, as shown in the main product picture. This header works with standard 0.1" male headers and our male jumper and precrimped wires. If this header is not convenient for your application, you can pull the crimped wires out of the header or cut the header off. The following table describes the wire functions:

Color Function
Red motor power (connects to one motor terminal)
Black motor power (connects to the other motor terminal)
Green encoder GND
Blue encoder Vcc (3.5 - 20 V)
Yellow encoder A output
White encoder B output
f.jpg


37D mm metal gearmotor with 64 CPR encoder (with end cap removed)..

d.jpg


The Hall sensor requires an input voltage, Vcc, between 3.5 and 20 V and draws a maximum of 10 mA. The A and B outputs are square waves from 0 V to Vcc approximately 90° out of phase. The frequency of the transitions tells you the speed of the motor, and the order of the transitions tells you the direction. The following oscilloscope capture shows the A and B (yellow and white) encoder outputs using a motor voltage of 12 V and a Hall sensor Vcc of 5 V:

e.jpg


Encoder A and B outputs for 37D mm metal gearmotor with 64 CPR encoder (motor running at 12 V).


By counting both the rising and falling edges of both the A and B outputs, it is possible to get 64 counts per revolution of the motor shaft. Using just a single edge of one channel results in 16 counts per revolution of the motor shaft, so the frequency of the A output in the above oscilloscope capture is 16 times the motor rotation frequency.


Gearmotor accessories

The face plate has six mounting holes evenly spaced around the outer edge threaded for M3 screws. These mounting holes form a regular hexagon and the centers of neighboring holes are 15.5 mm apart. We carry two brackets for these gearmotors: a stamped aluminum L-bracket (sold in pairs) and a sturdier, tombstone-style machined aluminum bracket (sold individually):

i.jpg


37D mm gearmotor (without encoder) with L-bracket and 6mm universal mounting hub.

j.jpg


Pololu machined aluminum bracket for 37D mm metal gearmotors mounting a motor to a clear piece of acrylic.


The 6 mm diameter gearbox output shaft works with the Pololu universal aluminum mounting hub for 6mm shafts, which can be used to mount our larger Pololu wheels (80mm- and 90mm-diameter) or custom wheels and mechanisms to the gearmotor’s output shaft as shown in the left picture below. Alternatively, you could use our 6mm scooter wheel adapter to mount many common scooter, skateboard, and inline skate wheels to the gearmotor’s output shaft as shown in the right picture below:

k.jpg


37D mm metal gearmotor with 64 CPR encoder connected to a Pololu 90×10mm wheel with a Pololu universal mounting hub.

L.jpg


A 37D mm gearmotor connected to a scooter wheel by the 6 mm scooter wheel adapter.


For a general-purpose hex adapter, consider our 12mm hex wheel adapter (also available in an extended version), which lets you use these motors with many common hobby RC wheels, including Dagu Wild Thumper Wheels:

l.jpg


12mm Hex Wheel Adapter for 6mm Shaft connecting a Wild Thumper Wheel to a 37D mm Metal Gearmotor.


We have a number of motor drivers and motor controllers that work with these 37D mm metal gearmotors. We generally recommend our High-Power Motor Drivers, which are available in various power levels and versions, including some dual-channel shields for Arduino and dual-channel expansion boards for Raspberry Pi. Additionally, our VNH5019-based motor drivers, which are also available as single and dual carriers, are a good match for these gearmotors.

n.jpg


Pololu Dual G2 High-Power Motor Driver 24v14 Shield for Arduino.

o.jpg


Pololu Dual G2 High-Power Motor Driver 24v14 for Raspberry Pi (assembled version) with included hardware.

p.jpg


Pololu dual VNH5019 motor driver shield for Arduino.


If you are looking for higher-level control interfaces, such as USB, RC, analog voltages, I2C, or TTL serial, consider our Simple Motor Controllers, Jrk motor controllers, or RoboClaw motor controllers; these controllers are available in various power levels several of which can handle these 37D mm metal gearmotors (we generally recommend a motor controller that can handle continuous currents above the stall current of your motor).

L.jpg


High-Power Simple Motor Controller G2 18v15.

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Jrk G2 21v3 USB Motor Controller with Feedback.

n.jpg


RoboClaw 2×7A Motor Controller (V5B) in its included case.


We have an assortment of Hall effect-based current sensors to choose from for those who need to monitor motor current:

o.jpg


ACS711EX current sensor carrier -15.5A to +15.5A.

p.jpg


ACS714 current sensor carrier -5A to +5A.


Selecting the right gearmotor

We offer a wide selection of metal gearmotors that offer different combinations of speed and torque.

07.jpg


Specifications

Dimensions

Size: 37D x 65L mm1
Weight: 190 g
Shaft diameter: 6 mm2


General specifications

Gear ratio: 10:1
No-load speed @ 12V: 1000 rpm
No-load current @ 12V: 0.2 A
Stall current @ 12V: 5.5 A3
Stall torque @ 12V: 4.9 kg·cm3
Max output power @ 12V: 12 W
No-load speed @ 6V: 490 rpm4
No-load current @ 6V: 0.15 A4
Stall current @ 6V: 3.0 A4
Stall torque @ 6V: 2.7 kg·cm4
Motor type: 12V


Performance at maximum efficiency

Max efficiency @ 12V: 52 %
Speed at max efficiency: 850 rpm
Torque at max efficiency: 0.66 kg·cm
Current at max efficiency: 0.91 A
Output power at max efficiency: 5.7 W


General specifications

Lead length: 20 cm5
Encoders?: Y
Encoder resolution: 64 CPR


Notes:

1 Length measurement is from gearbox face plate to back of encoder cap (it does not include the output shaft). See dimension diagram for details.
2 D shaft.
3 Stalling is likely to damage the gearmotor. Stall parameters come from a theoretical extrapolation of performance at loads far from stall. As the motor heats up, as happens as it approaches an actual stall, the stall torque and current decrease.
4 This motor will run at 6 V but is intended for operation at 12 V.
5 May vary by a few centimeters.


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10:1 Metal Gearmotor 37Dx65L mm 12V with 64 CPR Encoder (Helical Pinion)

10:1 Metal Gearmotor 37Dx65L mm 12V with 64 CPR Encoder (Helical Pinion)

This gearmotor is a powerful 12V brushed DC motor with a 10:1 metal gearbox and an integrated quadrature encoder that provides a resolution of 64 counts per revolution of the motor shaft, which corresponds to 640 counts per revolution of the gearbox’s output shaft. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.

Key specifications:

voltage no-load performance stall extrapolation
12V 1000 RPM, 150 mA 4.9 kg⋅cm (68 oz⋅in), 5.5 A


See Description for more details about the product.

Don't delay, buy today. Add to cart now!

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